1020 open center PS pump?

Tx Jim

Well-known Member
Anyone have any experience with the OC PS pump on early model JD 1020/2020 tractors? I've been asked on another forum about a missing relief ball that shown in JD tech manual but not listed in 1020/2020 parts catalog. Thanks for any help you might provide.

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Only thing I can think of to explain it is that it may come in with the AR39100 metering valve assembly ? It might be built up inside that assembly ? Have them look extra close at that.
I rebuilt one of these pumps off a 400 industrial model many, many years ago. Shaft was worn where seal rides. Redi sleeve fixed that. I might of had to make or source out bushings for the shafts too which are not listed in the parts catalog either. I don't remember too much about it. Which also might mean it was not a big issue to fix it ?
 
No experience with it but I think Mike is
correct on the assembly.

It wouldn't be a problem getting one
anyhow. It's just a steel ball and McMaster
has them dirt cheap. All they have to do is
measure the bore the ball fits in.
 
That ball is inside the metering spool if I remember right from last year. Had the pump all apart on my early 1020 and put gears and a center plate in it.
 

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